Diabetes, Vol 47, Issue 1 119-124, Copyright © 1998 by American Diabetes Association

ARTICLES

Hyperglycemia rather than insulin resistance is related to reduced coronary flow reserve in NIDDM

I Yokoyama, T Ohtake, S Momomura, K Yonekura, S Woo-Soo, J Nishikawa, Y Sasaki and M Omata
Second Department of Internal Medicine, University of Tokyo, Japan.

To clarify if coronary flow reserve (CFR) is related to insulin resistance or hyperglycemia in normotensive NIDDM, myocardial blood flow (MBF) at baseline and during dipyridamole loading were measured with 13N-ammonia positron-emission tomography. CFR was significantly reduced in NIDDM patients compared with age-matched control subjects. CFR in patients with well-controlled NIDDM was significantly higher than in those with poorly controlled NIDDM, whereas insulin resistance was comparable between the two groups. CFR in NIDDM patients was not related to the degree of insulin resistance. CFR correlated significantly with average fasting glucose concentration and average HbA1c, but not with insulin resistance, age, lipid parameters, or blood pressure. In conclusion, control of blood glucose concentration rather than insulin resistance is most likely related to the reduced CFR in NIDDM.
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